Voltage regulator provides big performance in tiny footprint

5th April 2018

Lanna Deamer

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Datasheet

The STLQ020 low-dropout (LDO) voltage regulator from STMicroelectronics relieves the familiar trade-offs between quiescent current, output power, dynamic response, and package size, to give designers extra freedom.

By combining small size with high performance and energy efficiency, the STLQ020 is suitable for use in battery-powered consumer products like smartphones and tablets, smart watches, audio or media devices, and wearables.

It helps extend battery life in IoT endpoints such as smart meters and wireless sensors, healthcare devices like wearable monitors, and industrial applications such as factory automation or sensor networking.

Drawing just 300nA quiescent current (Iq), and capable of supplying up to 200mA to the load with regulation, power-supply rejection (PSRR), and transient response, the STLQ020 is available in a choice of compact packages reaching as small as a 0.8x0.8mm flip-chip4.

This combination of attributes stems from the STLQ020’s dedicated low power design and adaptive bias circuitry, which ensures fast response and a stable output with high PSRR.

In addition, dropout voltage as low as 160mV (typical) at maximum load allows longer equipment runtimes as the battery discharges. Also, with the advantage of its 5nA logic-controlled shutdown mode, the STLQ020 can extend the interval between coin-cell replacements in low duty-cycle applications like remote sensors.

With an input voltage range of 2.0-5.5V, the STLQ020 can be powered directly from a suitable battery voltage (VBAT) or logic rail. The output voltage can be set between 0.8V and 4.5V, with either fixed-output or adjustable-output versions available. The fixed output voltages are selectable in 50mV increments.